Latest firmware for V4 "RU" still 20170306. After updating Killer drivers to latest and disabling SPI in router settings (to reduce processor load at least to 30% while idle) seems router more...

Only US-EU. For RU only outdated Archer C7(RU)_V4_170306

Same problem, firmware 1.0.0 Build 20170306 rel.39799(5255) (I guess "RU", checking for updates returns "no updates available" on russian). Archer C7 v4.0. Killer E2200 adapter. For me router works...